I need help identifying a squash...I couldn't find anything like it online...

It looks like a zucchini, its huge, green on the outside, but its yellow inside! It had big seeds toward the center...

Some lady I don't know gave it to me and said it was good sauteed with butter and onion. So, I did that, and I tried a couple of bites....but I'm all silly and paranoid about eating it because1. I don't know the lady who gave it to me2. I don't know what it is!!!

I KNOW, I'm slacking at posting pics, BUT (I still have only received one house) my laptop took a dump, for good (R.I.P.), so I am using someone else's right now. I will get a pic up as soon as I am able.